Joint carrier recovery and blind decision feedback equalizer over fast time-varying channels

Author

Yang, Huanzhen ; Zhu, Lidong

Author_Institution

Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2009

fDate

13-15 Nov. 2009

Firstpage

1

Lastpage

4

Abstract

This paper proposes a joint carrier recovery and blind decision feedback equalizer (DFE) based on stop-and-go MCMA and decision-direct least-mean-square (SG-MCMA-DD-LMS) algorithm. The equalizer initially operates in modified constant modulus algorithm (MCMA) mode under stop-and-go principle to compensate the channel distortion and acquire phase offset. When the channel eye is opened equalizer switches to decision-direct least-mean-square (DD-LMS) mode to decrease the mean square error (MSE) further and carrier recovery begins to work at the same time. Simulations show that the proposed scheme could achieve distorted channel equalization and larger carrier acquisition in fast time-varying channels.

Keywords

blind equalisers; decision feedback equalisers; least mean squares methods; time-varying channels; wireless channels; blind decision feedback equalizer; carrier acquisition; channel equalization; constant modulus algorithm; decision direct least mean square algorithm; joint carrier recovery; mean square error; stop-and-go MCMA; time-varying channel; Adaptive equalizers; Blind equalizers; Chromium; Decision feedback equalizers; Filters; Intersymbol interference; Phase distortion; Phase frequency detector; Switches; Time-varying channels; SG-MCMA-DD-LMS; decision feedback equalizer (DFE); phase frequency detector(PFD);

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications & Signal Processing, 2009. WCSP 2009. International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-4856-2

Electronic_ISBN

978-1-4244-5668-0

Type

conf

DOI

10.1109/WCSP.2009.5371743

Filename

5371743